| semi-open anaesthesia | <anaesthetics> Inhalation anaesthesia in which a portion of inhaled gases is derived from an anaesthesia circuit while the remainder consists of room air. (05 Mar 2000) |
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| hydrate microcrystal theory of anaesthesia | A theory of narcosis pertaining to nonhydrogen-bonding agents; postulates the interaction of the molecules of the anaesthetic drug with water molecules in the brain. Synonym: Pauling's theory. (05 Mar 2000) |
| hyperbaric anaesthesia | Inhalation of depressant gases or vapors at pressures greater than 1 atmosphere, especially as a means of producing general anaesthesia with agents too weak to produce anaesthesia at 1 atmosphere. (05 Mar 2000) |
| hyperbaric spinal anaesthesia | Spinal anaesthesia in which spread of local anaesthetic solution in the subarachnoid space is controlled by adjusting the position of the patient when the density of local anaesthetic is made greater than the density of cerebrospinal fluid (i.e., hyperbaric) by the addition of glucose. (05 Mar 2000) |
| hypobaric spinal anaesthesia | <anaesthetics> Spinal anaesthesia in which spread of local anaesthetic solution in the subarachnoid space is controlled by adjusting the position of the patient when the density of the local anaesthetic solution is made less than the density of cerebrospinal fluid (i.e., hypobaric) by the addition of distilled water. (05 Mar 2000) |
| hypotensive anaesthesia | Anaesthesia in which arterial hypotension is deliberately induced as a means of decreasing operative blood loss. (05 Mar 2000) |
| hypothermic anaesthesia | General anaesthesia administered in conjunction with artificial lowering of body temperature. (05 Mar 2000) |
| hysterical anaesthesia | Anaesthesia as a manifestation of hysteria, usually involving half the body or isolated patches not conforming to neuroanatomical distribution. (05 Mar 2000) |
| spinal anaesthesia | A form of regional anaesthesia that involves the injection of an anaesthetic into the epidural space (in the spinal canal), at predetermined location along the spine, to produce anaesthesia in all body regions that are supplied by nerves that arise below the anatomic region of the block. Often used for obstetrical procedures. Origin: Gr. Aisthesis = sensation (27 Sep 1997) |
| splanchnic anaesthesia | Loss of sensation in areas of the visceral peritoneum innervated by the splanchnic nerves. Synonym: visceral anaesthesia. (05 Mar 2000) |
| nerve block anaesthesia | Conduction anaesthesia in which local anaesthetic solution is injected about nerves, nerve trunks, or nerve plexuses. (05 Mar 2000) |
| stocking anaesthesia | Loss of sensation in the distal lower extremity, i.e., the foot and toes. (05 Mar 2000) |
| subarachnoid anaesthesia | A form of regional anaesthesia that involves the injection of an anaesthetic into the epidural space (in the spinal canal), at predetermined location along the spine, to produce anaesthesia in all body regions that are supplied by nerves that arise below the anatomic region of the block. Often used for obstetrical procedures. Origin: Gr. Aisthesis = sensation (27 Sep 1997) |
| nonrebreathing anaesthesia | A technique for inhalation anaesthesia in which valves exhaust all exhaled air from the circuit. (05 Mar 2000) |
| surgical anaesthesia | Any anaesthesia administered for the purpose of permitting performance of an operative procedure, as differentiated from obstetrical, diagnostic, and therapeutic anaesthesia, loss of sensation with muscle relaxation adequate for an operative procedure. (05 Mar 2000) |